Beta (#1234)

add_to_app/plugin/flutter_module_using_plugin/lib/cell.dart

@@ -15,7 +15,7 @@ void main() {
 }
 
 class Cell extends StatefulWidget {
-  const Cell({Key key}) : super(key: key);
+  const Cell({Key? key}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _CellState();
@@ -26,8 +26,8 @@ class _CellState extends State<Cell> with WidgetsBindingObserver {
   static final AccelerometerEvent defaultPosition = AccelerometerEvent(0, 0, 0);
 
   int cellNumber = 0;
-  Random _random;
-  AppLifecycleState appLifecycleState;
+  Random? _random;
+  AppLifecycleState? appLifecycleState;
 
   @override
   void initState() {
@@ -62,8 +62,8 @@ class _CellState extends State<Cell> with WidgetsBindingObserver {
   Color randomLightColor() {
     _random ??= Random(cellNumber);
 
-    return Color.fromARGB(255, _random.nextInt(50) + 205,
-        _random.nextInt(50) + 205, _random.nextInt(50) + 205);
+    return Color.fromARGB(255, _random!.nextInt(50) + 205,
+        _random!.nextInt(50) + 205, _random!.nextInt(50) + 205);
   }
 
   @override
@@ -113,15 +113,20 @@ class _CellState extends State<Cell> with WidgetsBindingObserver {
                             : Stream.value(defaultPosition),
                         initialData: defaultPosition,
                         builder: (context, snapshot) {
+                          final data = snapshot.data;
+                          if (data == null) {
+                            return const CircularProgressIndicator.adaptive();
+                          }
                           return Transform(
-                              // Figure out the phone's orientation relative
-                              // to gravity's direction. Ignore the z vector.
-                              transform: Matrix4.rotationX(
-                                  snapshot.data.y / gravity * pi / 2)
-                                ..multiply(Matrix4.rotationY(
-                                    snapshot.data.x / gravity * pi / 2)),
-                              alignment: Alignment.center,
-                              child: const FlutterLogo(size: 72));
+                            // Figure out the phone's orientation relative
+                            // to gravity's direction. Ignore the z vector.
+                            transform: Matrix4.rotationX(
+                              data.y / gravity * pi / 2,
+                            )..multiply(
+                                Matrix4.rotationY(data.x / gravity * pi / 2)),
+                            alignment: Alignment.center,
+                            child: const FlutterLogo(size: 72),
+                          );
                         },
                       ),
                     ),

add_to_app/plugin/flutter_module_using_plugin/lib/main.dart

@@ -69,7 +69,7 @@ class CounterModel extends ChangeNotifier {
 /// It offers two routes, one suitable for displaying as a full screen and
 /// another designed to be part of a larger UI.
 class MyApp extends StatelessWidget {
-  const MyApp({Key key}) : super(key: key);
+  const MyApp({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -86,7 +86,7 @@ class MyApp extends StatelessWidget {
 /// Wraps [Contents] in a Material [Scaffold] so it looks correct when displayed
 /// full-screen.
 class FullScreenView extends StatelessWidget {
-  const FullScreenView({Key key}) : super(key: key);
+  const FullScreenView({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -108,7 +108,7 @@ class FullScreenView extends StatelessWidget {
 class Contents extends StatelessWidget {
   final bool showExit;
 
-  const Contents({this.showExit = false, Key key}) : super(key: key);
+  const Contents({Key? key, this.showExit = false}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

add_to_app/plugin/flutter_module_using_plugin/pubspec.lock

@@ -42,14 +42,14 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0"
+    version: "1.16.0"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -61,7 +61,7 @@ packages:
       name: flutter_lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.1"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -78,14 +78,14 @@ packages:
       name: js
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.3"
+    version: "0.6.4"
   lints:
     dependency: transitive
     description:
       name: lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "2.0.0"
   matcher:
     dependency: transitive
     description:
@@ -99,7 +99,7 @@ packages:
       name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "0.1.4"
   meta:
     dependency: transitive
     description:
@@ -120,7 +120,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   plugin_platform_interface:
     dependency: transitive
     description:
@@ -153,7 +153,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.8.2"
   stack_trace:
     dependency: transitive
     description:
@@ -188,14 +188,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.8"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
+    version: "0.4.9"
   url_launcher:
     dependency: "direct main"
     description:
@@ -209,7 +202,7 @@ packages:
       name: url_launcher_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.15"
+    version: "6.0.16"
   url_launcher_ios:
     dependency: transitive
     description:
@@ -258,7 +251,7 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
+  dart: ">=2.17.0-206.0.dev <3.0.0"
   flutter: ">=2.10.0"

add_to_app/plugin/flutter_module_using_plugin/pubspec.yaml

@@ -4,7 +4,7 @@ description: An example Flutter module that uses a plugin.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.6.0-dev <3.0.0"
+  sdk: ">=2.17.0-0 <3.0.0"
 
 dependencies:
   flutter:
@@ -16,7 +16,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  flutter_lints: ^1.0.0
+  flutter_lints: ^2.0.1
 
 flutter:
   uses-material-design: true